Abstract: This earphone includes: a housing having a ring shape and provided with a hole; a diaphragm having a first fixing portion formed near an inner peripheral edge and a second fixing portion formed near an outer peripheral edge, the diaphragm being housed in the housing; and a voice coil connected to the diaphragm. A first protrusion, a second protrusion, and a flat portion that is provided between the first protrusion and the second protrusion are formed between the first fixing portion and the second fixing portion, and the voice coil is connected to the flat portion.

Abstract: Provided is a sound output device including an outer housing which includes a sound emission hole and in which an internal space is formed as a disposition space, and a speaker which is disposed in the disposition space and outputs a sound outward through the sound emission hole, and the sound output device is attachable or detachable to or from a holder attached to a garment. Thereby, the sound output device can be removed from the holder in an unused state or during maintenance, a failure or damage hardly occurs, an improvement in workability in maintenance work is also achieved, and an improvement in usability can be achieved.

Abstract: A computer having a housing including a passage extending from one side to an opposite side of the housing, and a plurality of air intake vents arranged in at least one wall of the passage and configured for taking in external air into the housing.

Abstract: A display device includes a housing holding a display panel with a display screen which is of an elongate rectangular shape as viewed in front elevation, and a stand, the housing being angularly movably supported on the stand for angular movement about a support shaft extending perpendicular to the display screen. The support shaft is positioned on a line extending from a center of the display screen which is positioned in a landscape display mode, obliquely upwardly at an angle.